#需求：爬取三国演义所有的章节和章节内容 http://www.shicimingju.com/book/sanguoyanyi.html

import requests
from bs4 import BeautifulSoup
if __name__ == "__main__":
    # UA伪装：将对应的User-Agent封装到一个字典
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36'
    }
    # 对首页的页面进行爬取
    url='https://www.shicimingju.com/book/sanguoyanyi.html'
    page_text_encoding = requests.get(url=url, headers=headers)
    page_text_encoding.encoding = "utf-8"
    page_text = page_text_encoding.text

    #在首页中解析出章节的标题和详情页信息的url
    #1.实例化BeautifulSoup对象，需要将页面源代码数据加载到该对象中
    soup = BeautifulSoup(page_text,'lxml')
    #2.解析章节标题和详情页的url
    li_list = soup.select('.book-mulu > ul > li')

    fp = open('./sanguo.txt','w',encoding='UTF-8')

    for li in li_list:#第一次循环拿到第一章章节标题和内容，以此类推
        title = li.a.string
        detail_url = 'https://www.shicimingju.com'+li.a['href']#获取章节标题 detail_url详情页的url
        #对详情页发起请求，解析出章节内容
        detail_page_text = requests.get(url=detail_url,headers=headers).text
        #解析出详情页中的相关内容
        detail_soup = BeautifulSoup(detail_page_text,'lxml')
        div_tag = detail_soup.find('div',class_='chapter_content')#进行属性定位
        #解析到了章节内容
        content = div_tag.text
        fp.write(title+':'+content+'\n')#写入标题+内容，\n表示第一个章节与第二个章节之间有个分隔符
        print(title,'爬取成功！')




